The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.The reader should not assume that the information is accurate and complete.

UNITED STATES SECURITIES AND EXCHANGE COMMISSIONWashington, D.C. 20549FORM 13F

FORM 13F COVER PAGE

OMB APPROVAL

OMB Number:

3235-0006

Expires:

Oct 31, 2018

Estimated average burden

hours per response:

23.8

Report for the Calendar Year or Quarter Ended:

12-31-2014

Check here if Amendment

Amendment Number:

This Amendment (Check only one.):

is a restatement.

adds new holdings entries.

Institutional Investment Manager Filing this Report:

Name:

Markel Corp

Address:

4521 Highwoods Pkwy

Glen Allen,
VA23060

Form 13F File Number:

028-06647

The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information contained herein is true, correct and complete, and that it is understood that all required items, statements, schedules, lists, and tables, are considered integral parts of this form.

Person Signing this Report on Behalf of Reporting Manager:

Name:

Thomas S. Gayner

Title:

President and Chief Investment Officer

Phone:

804-527-3806

Signature, Place, and Date of Signing:

/s/ Thomas S. Gayner

Richmond,
VA

02-09-2015

[Signature]

[City, State]

[Date]

Report Type (Check only one.):

X

13F HOLDINGS REPORT. (Check here if all holdings of this reporting manager are reported in this report.)

13F NOTICE. (Check here if no holdings reported are in this report, and all holdings are reported by other reporting manager(s).)

13F COMBINATION REPORT. (Check here if a portion of the holdings for this reporting manager are reported in this report and a portion are reported by other reporting manager(s).)

List of Other Managers Reporting for this Manager:
[If there are no entries in this list, omit this section.]

Form 13F File Number

Name

28-6056

Markel Gayner Asset Management Corporation

Form 13F Summary Page

Report Summary:

Number of Other Included Managers:

1

Form 13F Information Table Entry Total:

127

Form 13F Information Table Value Total:

3,971,119

(thousands)

List of Other Included Managers:

Provide a numbered list of the name(s) and Form 13F file number(s)
of all institutional investment managers with respect to which this report is filed, other than the
manager filing this report.

[If there are no entries in this list, state “NONE” and omit the
column headings and list entries.]